Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 279: | \[{20^{279}-1\over19}\] | 311 × 421 × 1489 × 11161 × 20089 × 1013329 × 1646101 × 22990159 × 48886381 × 64008001 × 340037881769<12> × 581740080393079<15> × 735669815930822532937503688968508571966425959548932871142136554846387363229<75> × [66974005863585334889057751452469848418777911521793484176271218181283295571526875345636844611102709978070286602052851001477933167559128517210041233105106434749878963827292034421908171740206483936372745495597299<209>] |